服务器代码:
package server.nio;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.ArrayList;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Server {
private static Logger log = LoggerFactory.getLogger(Server.class);
private static final Integer Default_Port = ;
private static final Integer Default_Timeout = ;
private static ConcurrentLinkedQueue<SocketChannel> workeQueue = new ConcurrentLinkedQueue<>();
private static ExecutorService executorService = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
private Integer port;
private Integer timeout;
public Server() {
this(Default_Port,Default_Timeout);
}
public Server(Integer port){
this(port,Default_Timeout);
}
public Server(Integer port,Integer timeout) throws IllegalArgumentException{
if(port == null) port = Default_Port;
if(timeout == null) timeout = Default_Timeout;
this.port = port;
this.timeout = timeout;
long st = System.currentTimeMillis();
try {
log.debug("服务器开始启动-->>");
ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();
serverSocketChannel.configureBlocking(false);
serverSocketChannel.bind(new InetSocketAddress(Default_Port));
//启动监听workQueue队列的线程
log.debug("任务队列监听线程启动开始--->>");
startListener();
log.debug("任务队列监听线程启动完成---<<");
//启动服务器
long et = System.currentTimeMillis();
log.debug("服务器启动完成:--<<");
log.debug("启动耗时:"+(et-st));
start(serverSocketChannel);
} catch (IOException e) {
e.printStackTrace();
}
}
private void startListener() {
Thread t = new Thread(new Runnable() {
public void run() {
while(true){
final SocketChannel sc = workeQueue.poll();
try {
if(sc != null){
if(log.isDebugEnabled()){
log.debug("开始处理客户端请求:"+sc);
}
executorService.submit(new Callable<Response>() {
@Override
public Response call() throws Exception {
//创建字节缓冲区
ByteBuffer bytes = ByteBuffer.allocate();
ArrayList<Byte> list = new ArrayList<>();
try {
//从通道中读取字节到缓冲区
while(sc.read(bytes) != -){
bytes.flip();
//判断字节缓冲区是否已满
while(bytes.remaining() > ){
//将缓冲区中的字节数组放到list中
//字节缓冲区满,但通道中的数据可能还没有读取完,因此需要将字节先保存起来
//最后统一处理(如果不这样做,可能会出现意外的结果:如最后转化成字符串,如不这样做,会因字节不完整而乱码)
list.add(bytes.get());
//清空字节缓冲区,以接收通道中剩余的数据
}
bytes.clear();
}
byte[] temp = new byte[list.size()];
//将list中的数据放到temp字节数组中
for(int i=;i<list.size();i++){
temp[i] = list.get(i);
}
//反序列化开始
try{
ByteArrayInputStream bin = new ByteArrayInputStream(temp);
ObjectInputStream oin = new ObjectInputStream(bin);
Object obj = oin.readObject();
// Object obj = ObjectUtil.deserializeJdk(temp);
System.out.println(obj);
}catch(Exception e){
log.debug("反序列化对象失败:请检查是否实现Serializable接口:");
e.printStackTrace();
}
//反序列化开始结束
} catch (Exception e) {
e.printStackTrace();
}
//处理响应对象
// ByteArrayOutputStream baos = new ByteArrayOutputStream();
// ObjectOutputStream oos = new ObjectOutputStream(baos);
// //将返回的对象序列化
// oos.writeObject(response);
// //将byte数组转换成通道可以接受的ByteBuffer类型
// ByteBuffer writeBytes = ByteBuffer.wrap(baos.toByteArray());
// sc.write(writeBytes);
// sc.close();
return null;
}
});
}
} catch (Exception e) {
e.printStackTrace();
}finally{
if(sc != null){
log.debug("客户端链接:"+sc+":关闭");
}else{
try {
Thread.sleep();
} catch (InterruptedException e) {
}
log.debug("等待连接....");
}
}
}
}
});
t.start();
}
private void start(ServerSocketChannel serverSocketChannel) {
while(true){
try {
SocketChannel socketChannel = serverSocketChannel.accept();
if(socketChannel != null){
if(log.isDebugEnabled()){
log.debug("客户端连接放进任务队列中:"+serverSocketChannel);
}
workeQueue.add(socketChannel);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 响应对象
* @author Administrator
*
*/
public class Response implements Serializable {
// private Integer status;
//
// private Integer code;
//
// private String desc;
//
// private Object data;
//
//
// public String getDesc() {
// return desc;
// }
//
// public void setDesc(String desc) {
// this.desc = desc;
// }
//
// public Integer getStatus() {
// return status;
// }
//
// public void setStatus(Integer status) {
// this.status = status;
// }
//
// public Integer getCode() {
// return code;
// }
//
// public void setCode(Integer code) {
// this.code = code;
// }
//
// public Object getData() {
// return data;
// }
//
// public void setData(Object data) {
// this.data = data;
// }
//
}
}
客户端类:
package client.nio;
import java.io.ByteArrayOutputStream;
import java.io.ObjectOutputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;
public class Client {
public static void main(String[] args) throws Exception {
SocketChannel socketChannel = SocketChannel.open();
socketChannel.connect(new InetSocketAddress(InetAddress.getLocalHost(), ));
// String test1 = "hello world";
String test = "Java IO的各种流是阻塞的。这意味着,当一个线程调用read() 或 write()时,该线程被阻塞,直到有一些数据被读取,或数据完全写入。该线程在此期间不能再干任何事情了。 Java NIO的非阻塞模式,使一个线程从某通道发送请求读取数据,但是它仅能得到目前可用的数据,如果目前没有数据可用时,就什么都不会获取。而不是保持线程阻塞,所以直至数据变的可以读取之前,该线程可以继续做其他的事情。 非阻塞写也是如此。一个线程请求写入一些数据到某通道,但不需要等待它完全写入,这个线程同时可以去做别的事情。 线程通常将非阻塞IO的空闲时间用于在其它通道上执行IO操作,所以一个单独的线程现在可以管理多个输入和输出通道(channel)。";
//序列化
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream oout = new ObjectOutputStream(bout);
oout.writeObject(test);
//创建字节缓冲区并发送给服务端
ByteBuffer buffer = ByteBuffer.wrap(bout.toByteArray());
socketChannel.write(buffer);
socketChannel.close();
}
}
测试:
启动服务器:
package server.nio;
public class Main {
public static void main(String[] args) {
Server server = new Server();
}
}
![这里写图片描述](https://img-blog.csdn.net/20161208180036256?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvcXFfMjUwMTQ1OTk=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast)
启动客户端并发送消息:
![这里写图片描述](https://img-blog.csdn.net/20161208175459426?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvcXFfMjUwMTQ1OTk=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast)